EPH OpenTherm User manual

P0 6: Setting DHW temperature
P0 7: OpenTherm® Information
P0 8: DHOP
P0 9: Set OpenTherm® Parameters
Exit
P0 6: Setting DHW temperature
P0 7: OpenTherm® Information
1. Installer menu (with OpenTherm® connected)
P0 1 - P0 5 as per RFRP standard
This menu allows the installer to change the DHW temperature of the boiler.
The temperature can be set in 0.5°C increments by pressing the “+” or “-”
buttons.
Press the“OK” button to select the desired temperature.
This menu is only available when the thermostat is connected to
OpenTherm® and DHOP is ON (P08 OT installer menu).
This menu allows the installer to view information received from the
OpenTherm® boiler. It may take a few seconds to load information relating
to each parameter. The information that can be shown from the boiler is
outlined in the table below.
P0 8: DHOP
P0 9: Set OpenTherm® Parameters
This menu allows the installer to activate or deactivate DHW target
temperature control from the thermostat. This menu is only available when
the thermostat is connected to OpenTherm®
This menu allows the installer to congure the OpenTherm® parameters.
To access the menu please enter the password “08” with the “+” and “–”
buttons.
Press“OK” to conrm.
The parameters that can be set are outlined in the table below.
Exit:
Climatic Curve
This menu allows the installer to return to the main interface.
It is also possible to exit the installer menu by pressing AUTO, MAN or OFF
whilst in the installer menu.
EPH Controls Ireland
[e-mail] www.ephcontrols.com
EPH Controls UK
[e-mail] www.ephcontrols.co.uk
Operating Instructions
Page 1 of 2
RFRP-OT Room Thermostat Wireless
Boiler Plus
20190430_RFRP-OT_OpIns_JW
RFRP-OT OpenTherm® Instructions
Displayed on
screen
tSEt
HHCH t-1 Maximum set point heating 45 - 85˚C 85˚C
85˚C
Minimum set point heating 10 - HHCH˚C 45˚C
This allows user to select dierent
climatic curves for weather
compensation. This only applies to
Boilers with an outside sensor
connected.
0.2 - 3.0 1.2
0 - 20 10
HHCH Max
>=ID57
>=LLCH Min
LLCH t-2
CLI t-3
InFL t-4
HHbO t-5
Exit
Target water temp
Outlet water temp
Return water temp
DHW temperature This is only visible if DHOP
is On (P08 OT Installer menu)
Dependent on boiler
Dependent on boiler
Dependent on boiler
This is only visible if DHOP
is On (P08 OT Installer menu)
Flue gas temperature
Outdoor temperature
Modulation percentage
Water ow
Water pressure
tFLO
trEt
tdH
tFLU
tESt
nOdU
FLOr
PrES
Description Remark
Param Description Range Default
Inuence of room sensor on modulation
of the boiler. Recommended value is 10.
This is the target setpoint for your CH
ow temperature.
Note: this value must be within the
range of HHCH and LLCH.
Press OK button to turn back to main
interface.
100 3 2.5
2
1.5
1.2
1
0.8
0.6
0.4
0.2
80
60
40
20
20 16 12 8 4 0 -4 -8 -12 -16

1. Press the button on the Hub receiver.
Red and Green lights will begin to ash.
2. Press the button on the next receiver to be paired.
The Red light will ash 3 times and then stop.
3. Repeat this process to pair more receivers, up to a maximum of 6
receivers.
RFRP-OT Thermostat
Motorised Valve Motorised Valve Motorised Valve
RF1A-OT Receiver
OpenTherm® Boiler
RFRP-OT Thermostat
RF1A-OT Hub Receiver
RFRP-OT Thermostat
RF1A-OT Receiver
Disconnecting the RF1A-OT receiver from Thermostats
and other Receiver
1. Press on the Receiver – the red light will ash (red and green
light if using a hub receiver)
2. Press and hold for about 10sec and the receiver will then stop
ashing.
3. The RF connection is now cleared.
Once all units have been paired, allow time for the receivers to begin to
communicate and receive OpenTherm® information from the boiler. This
may take approximately 2 – 5 minutes.
You will see the red light ash on the Hub receiver and see a corresponding
ash on the other receivers paired to the Hub Receiver when they are
sharing information.
You may need to pair the receivers to the thermostats again.
If so, please refer to section 17 of RFRP-OT Operating Instructions.
You can tell if your thermostat is receiving OpenTherm® information from
the boiler by entering the installer menu of the thermostat (Hold Prog and
OK buttons for 10 Sec) and go to P07 - Info.
If the installer menu is only showing P01 – P05, the thermostat and/or
receiver has not been successfully paired.
EPH Controls Ireland
[e-mail] www.ephcontrols.com
EPH Controls UK
[e-mail] www.ephcontrols.co.uk
Operating Instructions
Page 2 of 2
RFRP-OT Room Thermostat Wireless
Boiler Plus
20190430_RFRP-OT_OpIns_JW
RFRP-OT OpenTherm® Instructions
2. Controlling an OpenTherm® Boiler with multiple
CombiPack4-OT
3. System Architecture
Making your RF1A-OT receiver into a Hub Receiver
Example A 1 no. Thermostat controlling OT Boiler
Example B 3 no. Thermostats controlling OT Boiler
Note: A maximum of 6 thermostats can be used in the system.
1. Press the Reset button on the receiver that you wish to make
the Hub Receiver – Red and Green lights are both solid.
2. Immediately press and hold the and buttons for 5 seconds,
the red light will start blinking.
3. Press the button and the Green light will be solid – this is now
the hub receiver.
4. Press the button to exit to the normal interface.
Identifying if a receiver is a Hub Receiver
1. Press the button.
2. The Hub receiver will ash Green and Red.
3. The Normal receiver will just ash Red.
4. To exit to main interface press the button.
Pairing the RF1A-OT receivers together
It is possible to have 6 CombiPack4-OT controlling 1 OpenTherm boiler. To
do this it is necessary to make one of the RF1A-OT receivers into a Hub
Receiver. This Hub Receiver will receive data from all of the RFRP-OT
thermostats and relay this information to the boiler via OpenTherm®.
Note: The Hub Receiver should have a wired OpenTherm® connection to
the boiler.
Connect
Connect
Connect
Connect
Connect
RESET
Connect
Connect
Manual
Manual
Manual
RFRP-OT Thermostat RF1A-OT Receiver OpenTherm® Boiler
OT Auxiliary switch wire
from motorised valve